Optimisation of superplastic processing parameters for (Cu_(43)Zr_(48)Al_9)_(98)Y_2 bulk metallic glasses  

作　　者：Bing Li Xuanxuan Xu Hucheng Zhang Ke Yang Xinhui Fan Jinshan Li 

机构地区：[1]State Key Laboratory of Solidification Processing, Northwestern Polytechnical University [2]Shaanxi Key Laboratory for Photoelectric Functional Materials and Devices,Xi'an Technological University [3]Shanxi Jiangyang Chemical Co.,Ltd.

出　　处：《Journal of Rare Earths》2019年第1期95-100,M0005,共7页稀土学报（英文版）

基　　金：supported by the Principal Fund of Xi'an Technological University(0852-302021407)

摘　　要：In this study,hot compression tests of (Cu_(43)Zr_(48)Al_9)_(98)Y_2 bulk metallic glasses (BMGs) were performed,and their micro structure and thermal properties after the deformation were studied to explore the appropriate range of their optimum processing parameters. The experimental results show that the superplastic deformation of (Cu_(43)Zr_(48)Al_9)_(98)Y_2 bulk metallic glasses depends mainly on the temperature and strain rate. It is suitable for superplastic processing when the alloys are in the state of Newtonian flow and do not crystallise. The appropriate processing parameters of (Cu_(43)Zr_(48)Al_9)_(98)Y_2 BMGs are the temperatures and strain rates, which are below the "dividing line". And when the temperature is above733 K, the strain rate must be>1×10^(-3) s^(-1).In this study,hot compression tests of(Cu_(43)Zr_(48)Al_9)_(98)Y_2 bulk metallic glasses(BMGs) were performed,and their micro structure and thermal properties after the deformation were studied to explore the appropriate range of their optimum processing parameters. The experimental results show that the superplastic deformation of(Cu_(43)Zr_(48)Al_9)_(98)Y_2 bulk metallic glasses depends mainly on the temperature and strain rate. It is suitable for superplastic processing when the alloys are in the state of Newtonian flow and do not crystallise. The appropriate processing parameters of(Cu_(43)Zr_(48)Al_9)_(98)Y_2 BMGs are the temperatures and strain rates, which are below the "dividing line". And when the temperature is above733 K, the strain rate must be>1×10^(-3) s^(-1).

关 键 词：BULK metallic GLASSES SUPERPLASTIC Flow BEHAVIOUR Crystallisation BEHAVIOUR RARE earths 

分 类 号：TF[冶金工程]